HomeMy WebLinkAboutOWTS System Design 04.12.201615032_V-Topo.dwg 4/12/20161.10 PM
T.B.D. Huebinger Drive \
Lot 51: Westbank Ranch PUD, Filing IV \
County of Garfield, \ i
State of Colorado
Parcel No: 2392-022-06-051
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N.y' - / ® �' r ---
r r CDPHE APPROVED 2,000 -GALLON
-- ^fir• .'- s ^✓ / PRECAST CONCRETE TWO CHAMBER , /
N. `�. / t SEPTIC TANK WITH SCREENED DOSING
\ \ 1 ' - O PUMP PACKAGE (SEE DETAIL) / p
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INSTALL SEDIMENT CONTROL
FENCING ALONG THE LOWER LIMITS „r
OF ALL DISTURBANCES, TYP.
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SITE EVALUATION
1. SITE AND SOIL EVALUATIONS WERE PERFORMED BY:
DANIEL E. HARDIN, PE
H.P. GEOTECHNIC4I, INC.
5020 C.R. #154
GLENWOOD SPRINGS, CO 81601
970.945.7988
2. EVALUATION DATE(S):JANUARY 15, 2016.
3. SETBACK REQUIREMENTS FOR A TREATMENT LEVEL 1 STA TRENCH/BED, UNLINED
SAND FILTER OR SEEPAGE PIT (PER TABLE 7-1) AND AN ADWF= 600 GPD:
3.A. SPRING OR WELL=100'
3.6. POTABLE WATER SUPPLY LINE= 25'
3.C. POTABLE WATER SUPPLY CISTERN= 25'
3.D. DWELLING =20'
3.E. PROPERTY LINE, PIPE OR LINED IRRIGATION DITCH=10'
3.F. INTERMITTENT IRRIGATION LATERAL, INFILTRATION STRUCTURE=25'
3.G. LAKE, WATER COURSE, IRRIGATION DITCH, STREAM OR WETLAND=50'
3.H. DRY GULCH, CUT BANK OR FILL AREA=25'
3.1. SEPTIC TANK=5'
3.J. RESTRICTIVE LAYER OR GROUNDWATER (VERTICAL): 3' (TREATMENT LEVEL 1,
PRESSURE DOSING)
3. SETBACK REQUIREMENTS FOR THE SEPTIC TANK SHALL BE (PER TABLE 7-1):
3.A. SPRING OR WELL= 50'
3.B. POTABLE WATER SUPPLY LINE=10'
3.C. POTABLE WATER SUPPLY CISTERN= 25'
3.D. DWELLING=5'
3.E. PROPERTY LINE, PIPE OR LINED IRRIGATION DITCH=10'
3.E. INTERMITTENT IRRIGATION LATERAL, INFILTRATION STRUCTURE=10'
3.G. LAKE WATER COURSE, IRRIGATION DITCH, STREAM OR WETLAND =50'
3.H. DRY GULCH, CUT BANK OR FILL AREA=10'
3.1. STA TRENCH/BED, UNLINED SAND FILTER OR SEEPAGE PIT=5'
100 QUICK -4 UNITS (4x25) OR
64 ADS BIODIFFUSER UNITS (4x1
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SURFACE
aY
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8'B"-
_......
_ CLAY
- (CL)
SILTY,
- SLIGHTLY '-
- SANDY -
W TO
SANDY,
- SLIGHTLY
MOIST,
HARD -
BROWN, _
:CALCAREOUS
- (TYPE -3) -
1-1/2"0 SCH.80 PVC
DISTRIBUTION LINE
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PROPOSED
RESIDENCE
_-6110
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Site & Soils Evaluation
Scale: N.T.S.
IRRIG. VALVE BOX
1"0 BALL VALVE
THREATdASSEMBLY
1"X-1/2" PVC
REDUCER
1-1/2"0 PVC
ELBOW
0 Flush Valve
1-1/2"0 PVC
DISTRIBUTION PIPE
ATTACH REMOVABLE CAP OR
THREADED CLEANOUT ASSEMBLY.
INSTALL MARKER IF CAP IS TO
BE BURIED.
4' PVC WYE
�• 4"045°BEND
II�II�
FINISH GRADE
4°0 PVC RISER
4"0 SEWER LINE
\ Cleanout
Scale: N.T.S.
N,
ATTACH REMOVABLE CAP OR
THREADED CLEANOUT ASSEMBLY.
INSTALL MARKER IF CAP IS TO
BE BURIED.
4"0 PVC SOLID
PIPE CUT TO FIT
GENERAL ABSORPTION AREA NOTES
INSTALL CHAMBER UNITS IN ACCORDANCE WITH
MANUFACTURER'S RECOMMENDATIONS.
2. ABSORPTION BEDS SHALL NOT EXCEED 12' WIDE BY
100 -FEET IN LENGTH, SHALL PARALLEL THE
TOPOGRAPHY AND SHALL BE INSTALLED IN A
RECTANGULAR PATTERN WHENEVER POSSIBLE.
3. THE BOTTOM OF THE ABSORPTION BED SHALL BE
LEVEL AND THE BOTTOM AND SIDEWALLS MUST BE
RAKED TO REMOVE ANY SOIL SMEARS INCURRED
DURING THE EXCAVATION. FAILURE TO DO SO MAY
REQUIRE THE CONTRACTOR TO REPLACE THE
ABSORPTION FIELD AT HIS/HER OWN IXPENSE.
4. DRAINAGE SWALES ARE TO BE PROVIDED ABOVE
AND AROUND THE FIELD, AS NECESSARY, TO
PREVENT SURFACE RUNOFF FROM ENTERING
ABSORPTION AREA.
5. NO EXCAVATION OF THE ABSORPTION FIELD IS TO
BE DONE DURING WET WEATHER AND USE OF
RUBBER TIRE VEHICLES OVER THE ABSORPTION
AREA IS STRICTLY PROHIBITED.
6. UNSUITABLE MATERIAL EXISTING WITHIN THE FIELD
SHALL BE EXCAVATED AND BACKFILL SHALL
CONSIST OF IMPORTED LOAMY SAND OR SANDY
GRAVEL. THE ENGINEER SHALL BE CONTACTED IF
BEDROCK OR GROUNDWATER IS ENCOUNTERED IN
THE D(CAVATION.
7. TOPSOIL COVER MAY BE VARIED (1 -FOOT MINIMUM,
2 -FOOT MAXIMUM) TO ALLOW FOR LANDSCAPING.
m\
\
r COVER WITH 6" OF TOPSOIL
AND REVEGETATE
4'0 COUPLING (UNION).
USE A HOLE SAW TO CUT
OUT CIRCLE OFF THE
CENTER OF THE UNIT
i
4°0 PERFORATED PVC PIPE. "
EXTEND PIPE TO REST ON V.,.*�� ��y /\ ,
BOTTOM OF THE BED y/�.��: %��� /,
n Pressure Dosing Chamber Bed
ei N 1 S
GRAVELLESS CHAMBER SYSTEM:
INFILTRATOR QUICK 4, ADVANCED DRAINAGE
SYSTEMS BIODIFFUSER (STANDARD), OR
ENGINEER APPROVED EQUAL.
1-1/2°0 SCH. 40 PVC
�\ PRESSURE DOSING PIPE
WITH 3/16"0 HOLES EVERY
i 48"0.C. (FACING UP)
r%y� j
PREFABRICATED PIPE SUPPORT
OR MANUFACTURER SUPPLIED
HANGING SYSTEM (PIPE @ 6"
MIN. ABOVE BASE).
1
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Vicinity Map
1"=2000
to Carbondale
SYSTEM NOTES
1. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH CDPHE REGULATION #43 ONSITE WASTEWATER TREATMENT SYSTEM (OWTS) REGULATION, MOST
CURRENT EDITION AND LOCAL AGENCY REQUIREMENTS WHICH MAY OR MAY NOT SPECIFICALLY BE NOTED ON THE DRAWINGS. THE CONTRACTOR SHALL BE
RESPONSIBLE FOR KNOWING AND CONFORMING TO SUCH SPECIFIC DETAILS AS ARE REFERRED TO IN THE ABOVE MENTIONED REGULATIONS. THIS DRAWING
DOES NOT CONSTITUTE AN OWTS PERMIT. A PERMIT MUST BE OBTAINED FROM APPROPRIATE LOCAL AGENCY. THE ENGINEER MUST OBSERVE THE
CONSTRUCTED SYSTEM BEFORE BACKFILL AND PROVIDE A LEI IER OF INSPECTION AS REQUIRED BY THE LOCAL AGENCY. A REQUEST FOR INSPECTION MUST BE
MADE BY THE CONTRACTOR AT LEAST 48 -HOURS PRIOR TO THE EXPECTED TIME OF BACKFILLING.
2. DEMAND CALCULATIONS (SEC.43.6.A.2.h)
2.A. FIVE (5) BEDROOM RESIDENCE USING DOSING AND TREATMENT LEVEL 1 (TL1).
2.B. AVERAGE DAILY WASTEWATER FLOW (ADWF) AND ORGANIC LOAD RATE (BOD 5):
2.6.1. SINGLE FAMILY DWELLING: 75 gpdc & 0.20 BODS lbs/day
2.B.2. ADWF = 75 gpd(3 BEDROOMS ` 2 PERSONS/BEDROOM +1 BEDROOM ` 1 PERSON/BEDROOM) =600 gpd
2.8.3. BODS = 0.201bs/day ` (3 BEDROOMS " 2 PERSONS/BEDROOM + 2 BEDROOM ` 1 PERSON/BEDROOM)=1.60lbs/day
BODS mg/L = BODs"1,000,000 = 1.601bs/day`1,000,000 = 319 mg/L
ADWF"8.34 600 gpd`8.34
2.B.4. CBOD5 = BOD5' 0.85 = 271 mg/L
3. SEPTIC TANK (SEC.43.9.8.2.a):
3.A. SEPTIC TANK: 5 BEDROOMS = 1,250 GALLONS (4 BEDROOMS) + 1 ADDITIONAL BEDROOM ` 250 GALLONS = 1500 GALLONS.
3.B. DOSING SHALL REQUIRE THE USE OF A 2,000 -GALLON TWO-COMPARTMENT TANK OR A 1,500 -GALLON TWO-COMPARTMENT TANK IN SERIES WITH A
500 -GALLON SINGLE COMPARTMENT TANK EQUIPPED WITH A DOSING PUMP STATION.
3.C. THE TANK IS NOT SUBJECT TO BUOYANCY.
4. ABSORPTION AREA CALCULATIONS
4.A. GROUNDWATER WAS NOT ENCOUNTERED, THE OWTS SITE CONTAINS SLOPES LESS THAN 20%, BUT THE OWTS SITE IS UPHILL OF THE LOWER LEVEL OF THE
BUILDING. THEREFORE, THE SYSTEM SHALL BE A PRESSURE DOSED SHALLOW GRAVELLESS CHAMBER SYSTEM IN A BED CONFIGURATION. SOILS WERE
ANALYZED BY HEPWORTH-PAWLAK GEOTECHNICAL, INC. (JANUARY 15, 2016; PROJECT NO.115 591A) TO BE CLAY (CL) SILTY, SLIGHTLY SANDY TO SANDY,
SLIGHTLY MOIST, HARD BROWN, CALCAREOUS (TYPE -3) WITH A PERCOLATION RATE BETWEEN 7-10 MPI AND A RECOMMENDATION TO OVERSIZE THE
SYSTEM DUE TO THE CLAYEY SOILS AND POSSIBILITY OF A SLOWER ACTUAL PERCOLATION RATE THAN WHAT WAS TESTED. THEREFORE, THE SYSTEM HAS
BEEN DESIGN WITH A TREATMENT LEVEL 1 LONG TERM ACCEPTANCE RATE (LTAR) OF 0.35 gpd/SF.
4.B. MINIMUM SOIL TREATMENT AREA, A:
A = ADWF = 600 =1714.3 S.F.
LTAR 0.35 gpd/S.F.
4.C. SIZE ADJUSTMENT FACTORS: PRESSURE DOSING =1.0; CHAMBER BED = 0.7
4.C.1. A, adj = 1714.3 SF " 0.7 = 1200 SF
4.D. GRAVELLESS CHAMBER SYSTEM:
4.D.1. INFILTRATOR QUICK4:1200 SF / 12 SF/UNIT = 100 UNITS IN BED CONFIGURATION.
4.D.2. ADS BIODIFFUSER (STANDARD): 1200 SF / 18.75 SF/UNIT = 64 UNITS IN A BED CONFIGURATION.
5. THIS SYSTEM IS SIZED FOR TYPICAL DOMESTIC WASTES ONLY. BACKWASH OR FLUSHING FLOWS FOR REVERSE OSMOSIS UNITES OR WATER SOFTENERS AND/OR
FILTERS SHOULD NOT BE INTRODUCED INTO THIS SYSTEM.
6. CLEAN OUTS ARE REQUIRED AT THE HOUSE AND AT ALL BENDS AND AT LEAST EVERY 100 -FEET BETWEEN THE HOUSE AND THE SEPTIC TANK.
7. THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ALL WATER TIGHT COMPONENTS THROUGHOUT THE SYSTEM TO PREVENT INFILTRATION.
8. INSTALL RISERS AS NECESSARY TO BRING ALL ACCESS PORTS TO FINAL GRADE. PORTS SHALL BE MARKED IF CAPS ARE TO BE BURIED.
9. INSTALL 3 -INCHES OF BLUEBOARD INSULATION, 3 -FEET WIDE, OVER SEWER AND EFFLUENT PIPE WHEREVER DEPTH IS LESS THAN 5 -FEET. UNDER NO
CIRCUMSTANCES SHALL COVER BE LESS THAN 2 -FEET.
10. SITE PLAN INFORMATION FROM OTHERS. LOCATIONS OF ALL COMPONENTS MAY BE VARIED AS NECESSARY AS LONG AS ALL MINIMUM DISTANCES AND SLOPES
MEET THOSE REQUIRED.
Effluent Pumping System - 2nd Compartment Drawdown
Fiberglass Gasketed Lid
with Stainless Steel Bolts
Slope Ground
Away from Riser
PVC Riser with Grommet(s)
Inlet Tee
Patents # 4,439,323 & 5,492,635
Foreign Patents May Apply
p 2006, Orenco Systems, Inc.
Control Panel
To Control Panel
2,000 Gallon
Two -Compartment
Concrete Tank
(Comp. 11=1,500 Gal. Min.)
Conduit Seal
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Top View (NTS)
Simplex Pumping System
PVC Splice Box
w/Cord Grips
Fiberglass Gasketed Lid with
Stainless Steel Bolts
PVC Riser with Grommet(s)
Discharge Assembly
814 AIRWAY AVENUE
SUTHERLIN, OREGON
97479-9012
TOLL FREE:
(800) 348-9843
TELEPHONE:
(541) 459-4449
FACSIMILE:
(541) 459-2884
NDW-TD-EPS-03
Flexible Hose Rev. 3.0 (03/06)
Effluent Discharge
Tank Adapter (Cast or Bolted)
NOTES:
1. THE EXISTING TANK SYSTEM IS TO BE REMOVED AND DISPOSED.
2. FLOATS SHALL BE SET FOR A DOSING VOLUME OF 200 GALLONS (3 DOSES PER DAY).
3. SYSTEM TO BE INSTALLED IN CONFORMANCE WITH MANUFACTURER'S RECOMMENDATIONS.
4. THE DISCHARGE PUMP SHALL BE A HIGH HEAD VERTICAL TURBINE PUMP. PUMP RATE AND
MODEL TO BE SPECIFIED BY THE MANUFACTURER. CONTACT SCG ENTERPRISES AT
303.697.9404 OR VALLEY PRECAST, INC. AT 719.395.6764 FOR SYSTEM SPECIFICATIONS AND
INSTALLATION PROCEDURES.
5. THE PUMP SYSTEMS SHALL BE CONNECTED TO AN ALARM WHICH SHALL BE BOTH AUDIBLE
AND VISIBLE, LOCATED WITHIN THE RESIDENCE AND ON A CIRCUIT SEPARATE FROM THE PUMP.
6. THE SYSTEM SUPPLIER SHALL PROVIDE THE OWNER WITH AN OPERATIONS AND MAINTENANCE
MANUAL WHICH INCLUDES A MAINTENANCE SCHEDULE.
7. TANK DIMENSIONS ARE BASED ON A VALLEY PRECAST, INC. 2,000 GALLON
TWO-COMPARTMENT TANK WITH A HIGH HEAD PUMP.
CSeptic Tank & Dosing System
T
Flow Inducer
Level Control
Float Assembly
Filter Cartridge
Vault Inlet Pods
Orenco Effluent Pump
BietubPPump Vault
Bo Civil Engineering
dSurveying
& Beyond
coItaG
`O%t
e d jnc.
923 Cooper Avenue
Suite 201
Glenwood Springs, CO 81601
tele: 970.945.5252
fax: 970.384.2833
Engineer
or Surveyor
Seal
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Client Information:
BRIAN DERKASH
724 SAN JUAN DRIVE
LAFAYETTE, CO 80026
970.230.1048
NORTH
sim
20' 40
" = 20'
Know what's below.
Call before you dig.
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PRO32JECT NO.
150
Sheet
FILE NAME:
15032_v-topo.tlwg
H ner:
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sinner:
Date
4/12/16